DE8807383U1 - End catcher for a fabric laying machine - Google Patents

Description

Setec Maschinenbau GmbH Dottinger Strasse 89 7420 Münslngen

End catcher for a fabric laying machine

The invention relates to an end catcher for a fabric laying machine, with a catcher bar extending over the entire width of the fabric, on which several similar catcher bodies acting on the fabric are arranged next to one another.

The end catcher was divided into individual catch bodies in order to avoid the catch bar only being partially positioned, for example due to unevenness in the fabric support table. Each pressure body was provided with a separate spring. In addition to the great construction effort required for such an end catcher, the resulting uneven spring load on the individual catch bodies proved to be disadvantageous. In order to ensure sufficient contact pressure, relatively stiff individual springs had to be selected. There were also difficulties in arranging the individual springs on the end catcher, which had to be kept relatively flat in order to ensure perfect interaction with the laying bars of a zigzag laying device.

1 I I t t * t · ·· · ·

•&agr; 6486

I The invention is based on the object of providing an end catcher

;. of the type mentioned above in such a way that even in

&xgr; uneven surface and correspondingly uneven position

I of the individual impact bodies of the impact bar pressure differences

j» between the individual impact shields at least largely

• be avoided.

The task is solved with the end catcher mentioned according to the invention in that for all catch bodies a

! common, uniform pressure on all.. catch bodies

;' pern effecting spring element is provided.

i ^: The common spring element can advantageously consist of

I a covering all impact shields

&Ggr; spring cushion, which is filled with pressure fluid or pressure

\ gas. This feather pillow can be conveniently replaced by

• a tube can be formed that can be stored in the

; Inside a catch strip designed as a hollow rail

and which simultaneously impacts all the impact bodies stored in the impact bar.

If, for example, an unevenness in the material support layer on one or more of the individual catch elements creates a stronger counterpressure when the catch strip is applied, this counterpressure is distributed to all catch elements via the common spring element. Larger differences in the contact pressure of the individual catch elements are thus avoided and secure holding and good fold formation at the end of the material stack are achieved. The catch strip can be designed with a low construction height. Another advantage is that the pressure in the common spring cushion can be adapted to the type of material being processed.

can be adjusted, for which purpose the common spring cushion can advantageously be connected to a pressure source via a pressure control device.

An end catcher designed according to the invention can be used both in conjunction with a one-way laying device and in conjunction with a zigzag laying device.

An embodiment of the subject matter of the invention is explained in more detail below using the accompanying drawing.

In detail:

Fig. &igr; a schematic perspective overall view of a fabric laying machine with end catcher;

Fig. 2 is a partial front view of the catcher bar of the end catcher;

Fig. 3 shows a cross section through the catcher bar along the line III - III in Fig. 2.

From the schematic overall view of Fig. 1, a material laying machine 10 comprises a holder 11 for a material roll 12, a support table 13 for material layers 14, a carriage 15 which can be moved over the support table 13 and which has the material roll 12 with the material feed device having a material feed roller 16 and a laying device, and at one end of the support table 13 an end catcher.

···*♦« ·■ «· »&psgr; ■ a

Device 16 can be seen. An end catcher 17 is arranged on the device 16 and is adjustable in height. The end catcher 17 has a catcher bar 19, which is shown in more detail in Figures 2 and 3.

The catch strip 19 consists of a profile rail extending over the entire width of the support surface 13, which, according to Fig. 3, has a cross-section in the form of a U that is open at the bottom, the leg ends of which are drawn inwards to define a continuous gap 20. Several identical catch bodies 21 are mounted next to one another on the underside and contact side of the catch strip 19. The catch bodies, which are made in one piece from plastic, practically consist of two plates 21.1 and 21.2, which can be seen in Fig. 3, which are connected to one another by a central longitudinal web 21.3. The width of the central longitudinal web 21.3 corresponds to the width of the through slot 20 of the catcher bar 19. The longitudinal web length is greater than the wall thickness of the catcher bar 19. The width of one plate 21.1 of the catcher body 21 corresponds approximately to the clear inner width of the catcher bar 19. The catcher bodies 21 can be pushed into the hollow profile catcher bar 19 from one end.

Inside the hollow profile catch bar 19 there is a hose body 22 which extends over the entire length of the catch bar and can be filled with a compressed gas or a pressurized liquid. The hose body 22 forms a compression spring element common to all catch bodies 21, which rests against the inner plate 21.1 of all catch bodies 21 and, in the unloaded state, holds the catch bodies 21 with the inner plate 21.1 in contact with the retracted

-&Iacgr; non U-leg ends of the catcher bar 19. The outer bar 21.2 of the catcher body 21 forms the contact surface 21.4 of the catcher body 21 against the material layers Hl.

The hose body 22, which forms the common spring element for all impact bodies 21, can be filled with compressed gas or pressurized fluid via a valve (not shown) until a desired pressure value is reached. As indicated in Fig. 2 with dot-dash lines, the hose body 22 can also always be connected to a pressure control device 23 and be connected to a pressure source via this pressure control device 23. The pressure control device, which can also be part of a control device, allows a change in the internal pressure in the hose body 22 to adapt the pressure to different material webs.

Claims (5)

I &bgr; · · · <t &diams; Q 6486 Protection claims 1. End catcher for a fabric laying machine, with a catcher bar extending over the entire width of the fabric, on which several similar catcher bodies acting on the fabric web are arranged next to one another in a spring-loaded manner, characterized in that a common spring element (22) is provided for all catcher bodies (21), which causes a uniform pressure on all catcher bodies (21). 2. End catcher according to claim 1, characterized in that the spring element consists of a spring cushion extending over all the catching bodies (21) and filled with pressurized fluid or compressed gas. 3. End catcher according to claim 1 and 2, characterized in that the spring element consists of a hose (22) filled with pressurized fluid or pressurized gas, which is arranged inside a catcher bar (19) designed as a hollow rail and acts on the catcher body (21) mounted in the catcher bar (19). - 2 - 4' G 6486 F 4. End catcher according to one of claims 1 to 3, characterized in that the catching bodies (21) have two parallel plates (21.1, 21.2) connected to one another by a central web (21.3), of which one plate (21.2) forms the contact surface (21.4) on the material layers (14) and the other plate (21.1) forms the contact surface for the common spring element (22). 5. End catcher according to one of claims 1 to 4, characterized in that the common spring cushion (22) is connected to a pressure source via a pressure control device (23).